[90.03] The Star Formation History of UGCA 290, a Bimodal Blue Compact Dwarf

We present single-star photometry of UGCA 290, a nearby blue
dwarf galaxy traditionally described as an interacting
binary. Cycle 8 HST/WFPC2 observations resolve thousands of
individual stars in this galaxy, allowing the construction
of a color magnitude diagram (CMD) to an absolute magnitude
of approximately MI = -2.5. In addition to the bimodal
starburst, we find a scattered distribution of older red
giant stars. Comparing these data with synthetic CMDs, we
discuss the star-formation history of this galaxy.

Based on observations with the NASA/ESA Hubble Space
Telescope. Support for this work was provided by NASA
through grant number GO-08122.02-97A from the STScI, which
is operated by AURA, Inc. under NASA contract NAS5-26555.